feat: implement MoloApp plans 01-15 with integration

Full C++23 framework tree: runtime, observability, security,
data, app, realtime, supervisor, clients, CLI, example plus
enterprise tenancy, audit, operability, governance,
supplychain. Postgres via docker compose for tests.

example/app/Embedded.cpp

@@ -0,0 +1,19 @@
+#include "App.hpp"
+
+namespace molo::example::app {
+
+namespace {
+
+// Byte-identical reproducible bundle. Production bundles are generated by
+// the asset embedder CLI (09-cli-ops.md); this hand-written copy proves the
+// serving path with sorted names and no timestamps.
+
+}  // namespace
+
+void load_embedded(Services& services) {
+  services.embedded["/app.css"] =
+      "/* embedded bundle */\nbody{font-family:sans-serif}\n";
+  services.embedded["/hello.txt"] = "hello from embedded assets\n";
+}
+
+}  // namespace molo::example::app